SEOUL: Three Chinese fishermen likely died from smoke inhalation after a fire erupted when South Korean coast guard officers threw "flashbang" grenades into their boat, which had been fishing illegally, officials said today.

The latest in a series of violent clashes between South Korea's coast guard and Chinese fishing boats venturing farther from their increasingly barren home waters occurred yesterday when a South Korean coast guard vessel tried to stop the Chinese boat from suspected illegal fishing about 70 kilometers from an island off South Korea's southwestern coast.

The vessel, which carried 17 fishermen, initially resisted and fled before South Korean coast guard officers managed to board the boat and threw flashbang grenades into its locked steering room, the coast guard said in a statement. Flashbang grenades are non-lethal devices that produce a blinding flash of light and loud sound.

A fire erupted on the boat and three fishermen found lying in the boat's engine room later died, the coast guard statement said.

Coast guard officers said the three likely died after inhaling toxic smoke but that autopsies were planned to find the exact cause of their deaths. Authorities will also investigate if the flashbang grenades caused the fire.

The 14 surviving fishermen were taken to a South Korean port for questioning, according to the coast guard. Beijing's Foreign Ministry said Friday that China had asked for consultations on the incident and for assistance to the survivors and families of those killed.